Heating system and method for a jointed wind rotor turbine blade

Abstract

A jointed wind turbine rotor blade includes a first blade segment and a second blade segment. A chord-wise joint separates the first and second blade segments, wherein internal joint structure joins the first and second blade segments across the chord-wise joint. A first heating system is configured within the first blade segment, and a second heating system is configured within the second blade segment. A disconnectable coupling is configured between the first and second blade segments at the chord-wise joint to supply power or a fluid medium from the first blade segment across the chord-wise joint for use by the second heating system in the second blade segment.

What is claimed is: 
     
       1. A jointed wind turbine rotor blade, comprising:
 a first blade segment; 
 a second blade segment; 
 each of the first and second blade segments comprising a pressure side shell member and a suction side shell member; 
 a chord-wise joint separating the first and second blade segments; 
 internal joint structure joining the first and second blade segments across the chord-wise joint; 
 a sole first heating system mounted within the first blade segment; 
 a sole second heating system mounted within the second blade segment; 
 a disconnectable coupling configured between the first and second blade segments at the chord-wise joint; and 
 wherein the first heating system comprises a hot air heating system configured to deliver hot air within the first blade segment, and the second heating system comprises an electrical heating system configured to supply resistive heat within the second blade segment, the coupling comprising a disconnectable electrical coupling between a power source in the first blade segment and a heating element in the second blade segment, the disconnectable electrical coupling comprising a first member configured with the first blade segment that mates at the chord-wises joint with a second member configured with the second blade segment. 
 
     
     
       2. The jointed wind turbine rotor blade of  claim 1 , wherein the first blade segment is adjacent a root end of the wind turbine rotor blade, and the second blade segment is adjacent a tip end of the wind turbine rotor blade. 
     
     
       3. The jointed wind turbine rotor blade of  claim 1 , wherein the first and second heating systems are independently controllable. 
     
     
       4. The jointed wind turbine rotor blade of  claim 1 , wherein the internal joint structure comprises a beam structure extending span-wise from one of the first or second blade segments into a receiving section formed in the other of the second or first blade segment, the coupling configured across an external surface of the receiving section and an external surface of the beam structure at the chord-wise joint. 
     
     
       5. The jointed wind turbine rotor blade of  claim 1 , further comprising a lightning strike conductor that bridges the chordwise joint and connects blade tip receptors to a blade root grounding system, the lightning strike conductor comprising an in-line disconnectable connector at the chordwise joint. 
     
     
       6. The jointed wind turbine rotor blade of  claim 1 , wherein the internal joint structure comprises a beam structure extending span-wise from one of the first or second blade segments into a receiving section formed in the other of the second or first blade segment, the coupling configured through the receiving section and into the beam structure, wherein the power source is conveyed through an internal conduit in the beam structure. 
     
     
       7. The jointed wind turbine rotor blade of  claim 1 , wherein the internal joint structure comprises one or more chord-wise walls separating the first and second blade segments at the chord-wise joint, the coupling comprising one or more disconnectable conduits for the power source through the chord-wise walls. 
     
     
       8. A wind turbine, comprising one or more of the jointed wind turbine blades according to  claim 1 . 
     
     
       9. A method for supplying heat for deicing in a jointed wind turbine rotor blade, wherein the blade includes a first blade segment adjacent a root end of the wind turbine rotor blade, a second blade segment adjacent a tip end of the wind turbine rotor blade, and internal joint structure joining the first and second blade segments across a chord-wise joint that separates the first and second blade segments, the method comprising:
 mounting a sole first heating system within the first blade segment; 
 mounting a sole second heating system within the second blade segment; 
 configuring a disconnectable coupling between the first and second blade segments at the chord-wise joint; 
 supplying a power source from the first blade segment, through the coupling, and across the interface at the chord-wise joint for use by the second heating system in the second blade segment; and 
 wherein the first heating system is configured as a hot air heating system to supply heated air within the first blade segment, the second heating system is configured as an electrical heating system to supply resistive heat within the second blade segment, and the coupling is configured as a disconnectable electrical coupling between the power source in the first blade segment and a heating element in the second blade segment, the disconnectable electrical coupling comprising a first member configured with the first blade segment that mates at the chord-wise joint with a second member configured with the second blade segment. 
 
     
     
       10. The method of  claim 9 , wherein the internal joint structure includes a beam structure extending span-wise from the second blade segment into a receiving section formed in the first blade segment, comprising configuring the coupling with the receiving section and the beam structure. 
     
     
       11. The method of  claim 9 , comprising conveying the power source across the chord-wise joint and into the second blade segment through an internal conduit in a beam structure.